This was 3 times mostly the same code, with the 4 traditional BSDs
only differing in a single line, while MacOS X had more refined code
to do not only gateway determination, but also netmask, interface name
and MAC address.
The MacOS X code works perfectly well on the other BSDs *if* one macro
is #ifdef'ed to use "(uint32_t)" on MacOS X and "(long)" on all other
BSDs, 32 and 64 bit variants. API change by OSX when going to 64bit.
Tested on FreeBSD 8.3/i386, FreeBSD 9.1/amd64, NetbSD 5.1/amd64,
OpenBSD 4.9/i386, OpenBSD 5.4/amd64 (= all affected platforms except
DragonFly BSD).
See also trac#42 and trac#340.
Signed-off-by: Gert Doering <g...@greenie.muc.de>
---
src/openvpn/route.c | 246 +++++-----------------------------------------------
1 file changed, 21 insertions(+), 225 deletions(-)
diff --git a/src/openvpn/route.c b/src/openvpn/route.c
index d397f11..25c81b9 100644
--- a/src/openvpn/route.c
+++ b/src/openvpn/route.c
@@ -2606,118 +2606,9 @@ get_default_gateway (struct route_gateway_info *rgi)
gc_free (&gc);
}
-#elif defined(TARGET_FREEBSD)||defined(TARGET_DRAGONFLY)
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <net/route.h>
-
-struct {
- struct rt_msghdr m_rtm;
- char m_space[512];
-} m_rtmsg;
-
-#define ROUNDUP(a) \
- ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
-
-/*
- * FIXME -- add support for netmask, hwaddr, and iface
- */
-void
-get_default_gateway (struct route_gateway_info *rgi)
-{
- struct gc_arena gc = gc_new ();
- int s, seq, l, pid, rtm_addrs, i;
- struct sockaddr so_dst, so_mask;
- char *cp = m_rtmsg.m_space;
- struct sockaddr *gate = NULL, *sa;
- struct rt_msghdr *rtm_aux;
-
-#define NEXTADDR(w, u) \
- if (rtm_addrs & (w)) {\
- l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\
- }
-
-#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
-
-#define rtm m_rtmsg.m_rtm
-
- CLEAR(*rgi);
-
- pid = getpid();
- seq = 0;
- rtm_addrs = RTA_DST | RTA_NETMASK;
-
- bzero(&so_dst, sizeof(so_dst));
- bzero(&so_mask, sizeof(so_mask));
- bzero(&rtm, sizeof(struct rt_msghdr));
-
- rtm.rtm_type = RTM_GET;
- rtm.rtm_flags = RTF_UP | RTF_GATEWAY;
- rtm.rtm_version = RTM_VERSION;
- rtm.rtm_seq = ++seq;
- rtm.rtm_addrs = rtm_addrs;
-
- so_dst.sa_family = AF_INET;
- so_dst.sa_len = sizeof(struct sockaddr_in);
- so_mask.sa_family = AF_INET;
- so_mask.sa_len = sizeof(struct sockaddr_in);
-
- NEXTADDR(RTA_DST, so_dst);
- NEXTADDR(RTA_NETMASK, so_mask);
-
- rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
-
- s = socket(PF_ROUTE, SOCK_RAW, 0);
-
- if (write(s, (char *)&m_rtmsg, l) < 0)
- {
- msg(M_WARN|M_ERRNO, "Could not retrieve default gateway from route
socket:");
- gc_free (&gc);
- close(s);
- return;
- }
-
- do {
- l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
- } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
-
- close(s);
-
- rtm_aux = &rtm;
-
- cp = ((char *)(rtm_aux + 1));
- if (rtm_aux->rtm_addrs) {
- for (i = 1; i; i <<= 1)
- if (i & rtm_aux->rtm_addrs) {
- sa = (struct sockaddr *)cp;
- if (i == RTA_GATEWAY )
- gate = sa;
- ADVANCE(cp, sa);
- }
- }
- else
- {
- gc_free (&gc);
- return;
- }
-
-
- if (gate != NULL )
- {
- rgi->gateway.addr = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr);
- rgi->flags |= RGI_ADDR_DEFINED;
-
- gc_free (&gc);
- }
- else
- {
- gc_free (&gc);
- }
-}
-
-#elif defined(TARGET_DARWIN)
+#elif defined(TARGET_DARWIN) || \
+ defined(TARGET_FREEBSD) || defined(TARGET_DRAGONFLY) || \
+ defined(TARGET_OPENBSD) || defined(TARGET_NETBSD)
#include <sys/types.h>
#include <sys/socket.h>
@@ -2730,8 +2621,25 @@ struct rtmsg {
char m_space[512];
};
-#define ROUNDUP(a) \
+/* the route socket code is identical for all 4 supported BSDs and for
+ * MacOS X (Darwin), with one crucial difference: when going from
+ * 32 bit to 64 bit, the BSDs increased the structure size but kept
+ * source code compatibility by keeping the use of "long", while
+ * MacOS X decided to keep binary compatibility by *changing* the API
+ * to use "uint32_t", thus 32 bit on all OS X variants
+ *
+ * We used to have a large amount of duplicate code here which really
+ * differed only in this (long) vs. (uint32_t) - IMHO, worse than
+ * having a combined block for all BSDs with this single #ifdef inside
+ */
+
+#if defined(TARGET_DARWIN)
+# define ROUNDUP(a) \
((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) :
sizeof(uint32_t))
+#else
+# define ROUNDUP(a) \
+ ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
+#endif
#define NEXTADDR(w, u) \
if (rtm_addrs & (w)) {\
@@ -2925,118 +2833,6 @@ get_default_gateway (struct route_gateway_info *rgi)
#undef max
-#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD)
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <net/route.h>
-
-struct {
- struct rt_msghdr m_rtm;
- char m_space[512];
-} m_rtmsg;
-
-#define ROUNDUP(a) \
- ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
-
-/*
- * FIXME -- add support for netmask, hwaddr, and iface
- */
-void
-get_default_gateway (struct route_gateway_info *rgi)
-{
- struct gc_arena gc = gc_new ();
- int s, seq, l, rtm_addrs, i;
- pid_t pid;
- struct sockaddr so_dst, so_mask;
- char *cp = m_rtmsg.m_space;
- struct sockaddr *gate = NULL, *sa;
- struct rt_msghdr *rtm_aux;
-
-#define NEXTADDR(w, u) \
- if (rtm_addrs & (w)) {\
- l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\
- }
-
-#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
-
-#define rtm m_rtmsg.m_rtm
-
- CLEAR(*rgi);
-
- pid = getpid();
- seq = 0;
- rtm_addrs = RTA_DST | RTA_NETMASK;
-
- bzero(&so_dst, sizeof(so_dst));
- bzero(&so_mask, sizeof(so_mask));
- bzero(&rtm, sizeof(struct rt_msghdr));
-
- rtm.rtm_type = RTM_GET;
- rtm.rtm_flags = RTF_UP | RTF_GATEWAY;
- rtm.rtm_version = RTM_VERSION;
- rtm.rtm_seq = ++seq;
- rtm.rtm_addrs = rtm_addrs;
-
- so_dst.sa_family = AF_INET;
- so_dst.sa_len = sizeof(struct sockaddr_in);
- so_mask.sa_family = AF_INET;
- so_mask.sa_len = sizeof(struct sockaddr_in);
-
- NEXTADDR(RTA_DST, so_dst);
- NEXTADDR(RTA_NETMASK, so_mask);
-
- rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
-
- s = socket(PF_ROUTE, SOCK_RAW, 0);
-
- if (write(s, (char *)&m_rtmsg, l) < 0)
- {
- msg(M_WARN|M_ERRNO, "Could not retrieve default gateway from route
socket:");
- gc_free (&gc);
- close(s);
- return;
- }
-
- do {
- l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
- } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
-
- close(s);
-
- rtm_aux = &rtm;
-
- cp = ((char *)(rtm_aux + 1));
- if (rtm_aux->rtm_addrs) {
- for (i = 1; i; i <<= 1)
- if (i & rtm_aux->rtm_addrs) {
- sa = (struct sockaddr *)cp;
- if (i == RTA_GATEWAY )
- gate = sa;
- ADVANCE(cp, sa);
- }
- }
- else
- {
- gc_free (&gc);
- return;
- }
-
-
- if (gate != NULL )
- {
- rgi->gateway.addr = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr);
- rgi->flags |= RGI_ADDR_DEFINED;
-
- gc_free (&gc);
- }
- else
- {
- gc_free (&gc);
- }
-}
-
#else
/*
--
1.8.3.2
